Katie (Katie Featherson) and Micah (Micah Sloat) are a twenty-something couple who've just moved into a new home in San Diego, California. Katie has an interest in the paranormal and believes that malevolent spirits have been following her since childhood, though Micah is not so easily convinced. However, after several nights of loud noises and strange happenings, Micah starts to agree with Katie that some sort of ghost may have followed them to the new home. After a paranormal researcher tells the couple he can't help them, Micah decides to take control of the situation and sets up a battery of video cameras so if a spirit manifests itself, he can capture its behavior on tape. Once the surveillance cameras are in place, Katie and Micah bring in an Ouija board in an effort to talk to the spirits, a move that deeply offends the ghosts. Paranormal Activity was the first feature film from writer and director Oren Peli.

Great idea, but stupid film!!! Did neither of these idiots think to call a Priest? That'd have been my first call. The guy gets on my nerves too, I was praying he'd be slaughtered by the demon, he was begging for it!